ML083170292
| ML083170292 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 10/21/2008 |
| From: | Robuck S SCIENTECH |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML083170292 (4) | |
Text
SCENTECH d200 S. Woodruff Ave.
IdahO Fa4Is. ID83401 (2"8 529-1000 10 CFR PART 21 REPORTING FORM FOR REPORTING OF DEFECTS AND NONCOMPLIANCE OCTOBER 21, 2008 NAME AND ADDRESS OF REPORTING INDIVIDUAL(S) OR ORGANIZATIONS.
Scott Robuck, President Phone: 208-524-9250 Scientech,,a Curtiss Wright Flow Control company Fax! 208-524-9289 200 S. Woodruff Avenue Email: SRobuck@cuftisswright.com Idaho Falls, ID 83401 FACILITY, COMPONENT AND/OR PRODUCT THAT iS NONCOMPLIANT.
Scientech's MTH800 modules containing Ensign Power Systems, Inc. power supply Model 9061-01, serial numbers 15511 through 15614, 161.10 through 16128, and 16135 through 16215 SUPPLYING FIRM IDENTIFICATION (NAME, ADDRESS).
Scientech, a Cuttiss Wright Flow Control company Phone: 208-524-9250 200 8. Woodruff Avenue Fax: 208-524-9289 Idaho Falls, ID 83401 NATURE OF THE DEFECT, ASSOCIATED SAFETY HAZARD, AND THE DATE TInS INFORMATION WAS OBTAINED.
On October 15,2008, Ensign Power Systems, Inc. of Loveland, Colorado informed Scientech of a defect. An internal audit had revealed that some Model 906 1-01 power supplies provided to Scientech for use in their safety related line of NUSI modules had been inadvertently manufactured with an unauthorized part. The design controlled drawings invoked on the purchase orders required the use of two Murata capacitors, p/n GRM43DR72E334KWOIL in locations C2 and C5, part of the power line filter. When Ensign attempted to purchase the required parts, their supplier made an unauthorized substitution of AVX 1812PC334KATIA capacitors. These surface mount capacitors are virtually identical, and the packaging was labeled With the correct Ensign Power Systems part number. Ensign receipt inspection failed to detect the error, and Ensign proceeded to build 204 power supplies with the AVX capacitor in locations C2 and C5.
The AVX capacitor has the same nominal sPecifications as the Murata capacitor, which apparently led the distributor to make the unauthorized substitution. However, discussions with AVX Technical Representative Mr. Kenny Yi revealed that using AVX's capacitor in a power supply filter circuit is a misapplication of the device, which was designed for use in telephone circuits. Mr. Yi stated that use of this capacitor in power supply filter circuits will cause overheating and failure due to a piezo effect - electrostatic movement with the AC signal, Therefore, the AVX 1812PC334KAT1 A in not an acceptable substitute for the Murata capacitor.
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The Ensign Model 9061-01 power supply. is sold solely to Scieniech for its NUS Instruments productline.. "Me power'supply is used in many NUSl safety r-elated electronic process control modules. These modules are used as safety related replacements formodudes originally supplied for nuclear plants by Foxboro, Westinghouse, Bailey, General Electric and others. The AVX capacitors could fail open or shorted; the first would have little effect on the module, while the second would cause the module power fuse:toop'eni removing power from the module. In analog modules such as buffers, isolators, converters,, summers, dividers, and multipliers, this..would result in a zero output signal. In trip modules, thisWould result in the output relays going to a deenergized state.
'nTi NUMBER AND LOCATION OF ALL SUCH COMONENTS INUSE AT, SUPPLIED FOR, OR_
BEING SUPPLIED TO ONE OR MORE FAC LITIES SUBJECT1TOlD CFR 21.
Ensign Power Systems can trace every parts frompurchase orderto final assembly it was used in. Thisallowed them to identify, by serial number which Model 9066'1-001 power supplies were buit using. the AVX capacitor.
The serial numbers were and their lbcations are:
15511 through 1f5614 104 power suppies At Scientech 180 powersupplies 161 10. through 16128 1 19power supplies At Ensign .16 poWer sUpplies 16135 through, 16215.= 81 power suplies Shippd toClients.= '8power supplies 204 power supplies 204 powersupplies The serial niumbers of the eight shipped power supplies with:AVXcapacitors are:
15515, 15518, 15521], 15524, 1:5515, 15528, 15605, and 156Q8.
Scienteeh can trace every parts from purchase order to job it was used on. These power'supplies werte all bought under Scientech/NUSI Purchase-Order 08-114. Some were used.on Job 26667, which built six new MTTH800 modules for H.1. Robinson. The others were used iri three different jobs to reftirbish modules returned from H.B. Robinson. The jobs, quantity oftmodules built' module serial numbers, and client purchase order numbers are shown below.
Job tY ModelNUmber WSeiial'uiribeS ClientClienit P0 26667 /65/05/05-07L08 080 1197 to 0801202 -Robinson. 00372684 26697 3 MT .I1 07 5 1 5,07-08 (Refurbish) 05/05 9500069500310, 95003j5 Robinson 00382853 IJ MTI800-05/05/05105-07.-O8X4Refurbish) 9500322 00384994 26702 ".RObinson
. SAM890 (R.furbisk) 4506822.
1,6 1 MTH,1800405/095,0057-08(-Refurbish) 9400121 Robinson 00391438 Examination of the twelve modules revealedlthat the power supplies with the AVX capacitors were used in 8 MTH800 modules. s/ 9400121,.9500306, 9500322,9500335, 0801198, 080H199, 0801200, and080120.1.
Robinson has returned the modules to Scientech, and .the power supplies have all been replaced with supplies containing the c6rrect caacitor.
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COPJRECTIVE ACTION, WHICH HAS BEEN, IS BEING, OR SHOULD BE TAKEN, INCLUDING RESPONSIBLE PARTIES AND AN ESTIMATE OF THE TIME INVOLVED.
- Scientech immediately put a HOLD on all shipments of modules with Ensign power supplies until it could be verified that they were built using the correct parts (Complete 10/15/08).
- Scientech located all Ensign power supplies in house and isolated them (Complete 10/16/08).
- Scientech notified H. B. Robinson that some of the twelve modules contain power supplies with unauthorized parts (Complete 10/16/08).
0 Scientech is working with H. B. Robinson to replace the eight Ensign power supplies with unauthorized parts (in progress).
e Scientech will return all affecied power supplies to Ensign for installation of the approved components.
- Scientech will review the revised Ensign receipt inspection procedures to assure that they are robust enough to preyent reoccurrence.
COMMENTS OR ADVICE THAT SHOULD BE GIVEN TO OTHER PURCHASERS OR LISCENSEES.
None.
Submitted by:
Scott Robuck, General Manager 6 -
Scientech, a Curtiss Wright Flow Control company FlowfConfol, uivfclar
a Curtiss-Wright Flow Control company SeSCIENTECH Tony Gill, Quality Assurance Manager Tel: 256/722-8500, ext. 131 EGS, Huntsville Operations Fax: 256/722-8533 125 West Park Loop Cell: 256/426-4558 Huntsville, Alabama 35806 tgill@curtisswright.com www.scientech.corn